struct gendisk *disk;
};
-static void nfhd_make_request(struct request_queue *queue, struct bio *bio)
+static blk_qc_t nfhd_make_request(struct request_queue *queue, struct bio *bio)
{
struct nfhd_device *dev = queue->queuedata;
struct bio_vec bvec;
sec += len;
}
bio_endio(bio);
+ return BLK_QC_T_NONE;
}
static int nfhd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
* axon_ram_make_request - make_request() method for block device
* @queue, @bio: see blk_queue_make_request()
*/
-static void
+static blk_qc_t
axon_ram_make_request(struct request_queue *queue, struct bio *bio)
{
struct axon_ram_bank *bank = bio->bi_bdev->bd_disk->private_data;
bio_for_each_segment(vec, bio, iter) {
if (unlikely(phys_mem + vec.bv_len > phys_end)) {
bio_io_error(bio);
- return;
+ return BLK_QC_T_NONE;
}
user_mem = page_address(vec.bv_page) + vec.bv_offset;
transfered += vec.bv_len;
}
bio_endio(bio);
+ return BLK_QC_T_NONE;
}
/**
spin_unlock(&dev->lock);
}
-static void simdisk_make_request(struct request_queue *q, struct bio *bio)
+static blk_qc_t simdisk_make_request(struct request_queue *q, struct bio *bio)
{
struct simdisk *dev = q->queuedata;
struct bio_vec bvec;
}
bio_endio(bio);
+ return BLK_QC_T_NONE;
}
static int simdisk_open(struct block_device *bdev, fmode_t mode)
}
EXPORT_SYMBOL(blk_init_queue_node);
-static void blk_queue_bio(struct request_queue *q, struct bio *bio);
+static blk_qc_t blk_queue_bio(struct request_queue *q, struct bio *bio);
struct request_queue *
blk_init_allocated_queue(struct request_queue *q, request_fn_proc *rfn,
blk_rq_bio_prep(req->q, req, bio);
}
-static void blk_queue_bio(struct request_queue *q, struct bio *bio)
+static blk_qc_t blk_queue_bio(struct request_queue *q, struct bio *bio)
{
const bool sync = !!(bio->bi_rw & REQ_SYNC);
struct blk_plug *plug;
if (bio_integrity_enabled(bio) && bio_integrity_prep(bio)) {
bio->bi_error = -EIO;
bio_endio(bio);
- return;
+ return BLK_QC_T_NONE;
}
if (bio->bi_rw & (REQ_FLUSH | REQ_FUA)) {
*/
if (!blk_queue_nomerges(q)) {
if (blk_attempt_plug_merge(q, bio, &request_count, NULL))
- return;
+ return BLK_QC_T_NONE;
} else
request_count = blk_plug_queued_count(q);
out_unlock:
spin_unlock_irq(q->queue_lock);
}
+
+ return BLK_QC_T_NONE;
}
/*
* a lower device by calling into generic_make_request recursively, which
* means the bio should NOT be touched after the call to ->make_request_fn.
*/
-void generic_make_request(struct bio *bio)
+blk_qc_t generic_make_request(struct bio *bio)
{
struct bio_list bio_list_on_stack;
+ blk_qc_t ret = BLK_QC_T_NONE;
if (!generic_make_request_checks(bio))
- return;
+ goto out;
/*
* We only want one ->make_request_fn to be active at a time, else
*/
if (current->bio_list) {
bio_list_add(current->bio_list, bio);
- return;
+ goto out;
}
/* following loop may be a bit non-obvious, and so deserves some
if (likely(blk_queue_enter(q, __GFP_WAIT) == 0)) {
- q->make_request_fn(q, bio);
+ ret = q->make_request_fn(q, bio);
blk_queue_exit(q);
}
} while (bio);
current->bio_list = NULL; /* deactivate */
+
+out:
+ return ret;
}
EXPORT_SYMBOL(generic_make_request);
* interfaces; @bio must be presetup and ready for I/O.
*
*/
-void submit_bio(int rw, struct bio *bio)
+blk_qc_t submit_bio(int rw, struct bio *bio)
{
bio->bi_rw |= rw;
}
}
- generic_make_request(bio);
+ return generic_make_request(bio);
}
EXPORT_SYMBOL(submit_bio);
* but will attempt to bypass the hctx queueing if we can go straight to
* hardware for SYNC IO.
*/
-static void blk_mq_make_request(struct request_queue *q, struct bio *bio)
+static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
{
const int is_sync = rw_is_sync(bio->bi_rw);
const int is_flush_fua = bio->bi_rw & (REQ_FLUSH | REQ_FUA);
if (bio_integrity_enabled(bio) && bio_integrity_prep(bio)) {
bio_io_error(bio);
- return;
+ return BLK_QC_T_NONE;
}
blk_queue_split(q, &bio, q->bio_split);
if (!is_flush_fua && !blk_queue_nomerges(q)) {
if (blk_attempt_plug_merge(q, bio, &request_count,
&same_queue_rq))
- return;
+ return BLK_QC_T_NONE;
} else
request_count = blk_plug_queued_count(q);
rq = blk_mq_map_request(q, bio, &data);
if (unlikely(!rq))
- return;
+ return BLK_QC_T_NONE;
if (unlikely(is_flush_fua)) {
blk_mq_bio_to_request(rq, bio);
old_rq = rq;
blk_mq_put_ctx(data.ctx);
if (!old_rq)
- return;
+ return BLK_QC_T_NONE;
if (!blk_mq_direct_issue_request(old_rq))
- return;
+ return BLK_QC_T_NONE;
blk_mq_insert_request(old_rq, false, true, true);
- return;
+ return BLK_QC_T_NONE;
}
if (!blk_mq_merge_queue_io(data.hctx, data.ctx, rq, bio)) {
blk_mq_run_hw_queue(data.hctx, !is_sync || is_flush_fua);
}
blk_mq_put_ctx(data.ctx);
+ return BLK_QC_T_NONE;
}
/*
* Single hardware queue variant. This will attempt to use any per-process
* plug for merging and IO deferral.
*/
-static void blk_sq_make_request(struct request_queue *q, struct bio *bio)
+static blk_qc_t blk_sq_make_request(struct request_queue *q, struct bio *bio)
{
const int is_sync = rw_is_sync(bio->bi_rw);
const int is_flush_fua = bio->bi_rw & (REQ_FLUSH | REQ_FUA);
if (bio_integrity_enabled(bio) && bio_integrity_prep(bio)) {
bio_io_error(bio);
- return;
+ return BLK_QC_T_NONE;
}
blk_queue_split(q, &bio, q->bio_split);
if (!is_flush_fua && !blk_queue_nomerges(q) &&
blk_attempt_plug_merge(q, bio, &request_count, NULL))
- return;
+ return BLK_QC_T_NONE;
rq = blk_mq_map_request(q, bio, &data);
if (unlikely(!rq))
- return;
+ return BLK_QC_T_NONE;
if (unlikely(is_flush_fua)) {
blk_mq_bio_to_request(rq, bio);
}
list_add_tail(&rq->queuelist, &plug->mq_list);
blk_mq_put_ctx(data.ctx);
- return;
+ return BLK_QC_T_NONE;
}
if (!blk_mq_merge_queue_io(data.hctx, data.ctx, rq, bio)) {
}
blk_mq_put_ctx(data.ctx);
+ return BLK_QC_T_NONE;
}
/*
return err;
}
-static void brd_make_request(struct request_queue *q, struct bio *bio)
+static blk_qc_t brd_make_request(struct request_queue *q, struct bio *bio)
{
struct block_device *bdev = bio->bi_bdev;
struct brd_device *brd = bdev->bd_disk->private_data;
out:
bio_endio(bio);
- return;
+ return BLK_QC_T_NONE;
io_error:
bio_io_error(bio);
+ return BLK_QC_T_NONE;
}
static int brd_rw_page(struct block_device *bdev, sector_t sector,
/* drbd_req */
extern void do_submit(struct work_struct *ws);
extern void __drbd_make_request(struct drbd_device *, struct bio *, unsigned long);
-extern void drbd_make_request(struct request_queue *q, struct bio *bio);
+extern blk_qc_t drbd_make_request(struct request_queue *q, struct bio *bio);
extern int drbd_read_remote(struct drbd_device *device, struct drbd_request *req);
extern int is_valid_ar_handle(struct drbd_request *, sector_t);
}
}
-void drbd_make_request(struct request_queue *q, struct bio *bio)
+blk_qc_t drbd_make_request(struct request_queue *q, struct bio *bio)
{
struct drbd_device *device = (struct drbd_device *) q->queuedata;
unsigned long start_jif;
inc_ap_bio(device);
__drbd_make_request(device, bio, start_jif);
+ return BLK_QC_T_NONE;
}
void request_timer_fn(unsigned long data)
return &nullb->queues[index];
}
-static void null_queue_bio(struct request_queue *q, struct bio *bio)
+static blk_qc_t null_queue_bio(struct request_queue *q, struct bio *bio)
{
struct nullb *nullb = q->queuedata;
struct nullb_queue *nq = nullb_to_queue(nullb);
cmd->bio = bio;
null_handle_cmd(cmd);
+ return BLK_QC_T_NONE;
}
static int null_rq_prep_fn(struct request_queue *q, struct request *req)
}
}
-static void pkt_make_request(struct request_queue *q, struct bio *bio)
+static blk_qc_t pkt_make_request(struct request_queue *q, struct bio *bio)
{
struct pktcdvd_device *pd;
char b[BDEVNAME_SIZE];
*/
if (bio_data_dir(bio) == READ) {
pkt_make_request_read(pd, bio);
- return;
+ return BLK_QC_T_NONE;
}
if (!test_bit(PACKET_WRITABLE, &pd->flags)) {
pkt_make_request_write(q, split);
} while (split != bio);
- return;
+ return BLK_QC_T_NONE;
end_io:
bio_io_error(bio);
+ return BLK_QC_T_NONE;
}
-
-
static void pkt_init_queue(struct pktcdvd_device *pd)
{
struct request_queue *q = pd->disk->queue;
return next;
}
-static void ps3vram_make_request(struct request_queue *q, struct bio *bio)
+static blk_qc_t ps3vram_make_request(struct request_queue *q, struct bio *bio)
{
struct ps3_system_bus_device *dev = q->queuedata;
struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
spin_unlock_irq(&priv->lock);
if (busy)
- return;
+ return BLK_QC_T_NONE;
do {
bio = ps3vram_do_bio(dev, bio);
} while (bio);
+
+ return BLK_QC_T_NONE;
}
static int ps3vram_probe(struct ps3_system_bus_device *dev)
}
}
-static void rsxx_make_request(struct request_queue *q, struct bio *bio)
+static blk_qc_t rsxx_make_request(struct request_queue *q, struct bio *bio)
{
struct rsxx_cardinfo *card = q->queuedata;
struct rsxx_bio_meta *bio_meta;
if (st)
goto queue_err;
- return;
+ return BLK_QC_T_NONE;
queue_err:
kmem_cache_free(bio_meta_pool, bio_meta);
if (st)
bio->bi_error = st;
bio_endio(bio);
+ return BLK_QC_T_NONE;
}
/*----------------- Device Setup -------------------*/
return !!blk_check_plugged(mm_unplug, card, sizeof(struct blk_plug_cb));
}
-static void mm_make_request(struct request_queue *q, struct bio *bio)
+static blk_qc_t mm_make_request(struct request_queue *q, struct bio *bio)
{
struct cardinfo *card = q->queuedata;
pr_debug("mm_make_request %llu %u\n",
activate(card);
spin_unlock_irq(&card->lock);
- return;
+ return BLK_QC_T_NONE;
}
static irqreturn_t mm_interrupt(int irq, void *__card)
/*
* Handler function for all zram I/O requests.
*/
-static void zram_make_request(struct request_queue *queue, struct bio *bio)
+static blk_qc_t zram_make_request(struct request_queue *queue, struct bio *bio)
{
struct zram *zram = queue->queuedata;
__zram_make_request(zram, bio);
zram_meta_put(zram);
- return;
+ return BLK_QC_T_NONE;
put_zram:
zram_meta_put(zram);
error:
bio_io_error(bio);
+ return BLK_QC_T_NONE;
}
static void zram_slot_free_notify(struct block_device *bdev,
return NVM_IO_OK;
}
-static void rrpc_make_rq(struct request_queue *q, struct bio *bio)
+static blk_qc_t rrpc_make_rq(struct request_queue *q, struct bio *bio)
{
struct rrpc *rrpc = q->queuedata;
struct nvm_rq *rqd;
if (bio->bi_rw & REQ_DISCARD) {
rrpc_discard(rrpc, bio);
- return;
+ return BLK_QC_T_NONE;
}
rqd = mempool_alloc(rrpc->rq_pool, GFP_KERNEL);
if (!rqd) {
pr_err_ratelimited("rrpc: not able to queue bio.");
bio_io_error(bio);
- return;
+ return BLK_QC_T_NONE;
}
memset(rqd, 0, sizeof(struct nvm_rq));
err = rrpc_submit_io(rrpc, bio, rqd, NVM_IOTYPE_NONE);
switch (err) {
case NVM_IO_OK:
- return;
+ return BLK_QC_T_NONE;
case NVM_IO_ERR:
bio_io_error(bio);
break;
}
mempool_free(rqd, rrpc->rq_pool);
+ return BLK_QC_T_NONE;
}
static void rrpc_requeue(struct work_struct *work)
/* Cached devices - read & write stuff */
-static void cached_dev_make_request(struct request_queue *q, struct bio *bio)
+static blk_qc_t cached_dev_make_request(struct request_queue *q,
+ struct bio *bio)
{
struct search *s;
struct bcache_device *d = bio->bi_bdev->bd_disk->private_data;
else
generic_make_request(bio);
}
+
+ return BLK_QC_T_NONE;
}
static int cached_dev_ioctl(struct bcache_device *d, fmode_t mode,
continue_at(cl, search_free, NULL);
}
-static void flash_dev_make_request(struct request_queue *q, struct bio *bio)
+static blk_qc_t flash_dev_make_request(struct request_queue *q,
+ struct bio *bio)
{
struct search *s;
struct closure *cl;
continue_at_nobarrier(&s->cl,
flash_dev_nodata,
bcache_wq);
- return;
+ return BLK_QC_T_NONE;
} else if (rw) {
bch_keybuf_check_overlapping(&s->iop.c->moving_gc_keys,
&KEY(d->id, bio->bi_iter.bi_sector, 0),
}
continue_at(cl, search_free, NULL);
+ return BLK_QC_T_NONE;
}
static int flash_dev_ioctl(struct bcache_device *d, fmode_t mode,
* The request function that just remaps the bio built up by
* dm_merge_bvec.
*/
-static void dm_make_request(struct request_queue *q, struct bio *bio)
+static blk_qc_t dm_make_request(struct request_queue *q, struct bio *bio)
{
int rw = bio_data_dir(bio);
struct mapped_device *md = q->queuedata;
queue_io(md, bio);
else
bio_io_error(bio);
- return;
+ return BLK_QC_T_NONE;
}
__split_and_process_bio(md, map, bio);
dm_put_live_table(md, srcu_idx);
- return;
+ return BLK_QC_T_NONE;
}
int dm_request_based(struct mapped_device *md)
* call has finished, the bio has been linked into some internal structure
* and so is visible to ->quiesce(), so we don't need the refcount any more.
*/
-static void md_make_request(struct request_queue *q, struct bio *bio)
+static blk_qc_t md_make_request(struct request_queue *q, struct bio *bio)
{
const int rw = bio_data_dir(bio);
struct mddev *mddev = q->queuedata;
if (mddev == NULL || mddev->pers == NULL
|| !mddev->ready) {
bio_io_error(bio);
- return;
+ return BLK_QC_T_NONE;
}
if (mddev->ro == 1 && unlikely(rw == WRITE)) {
if (bio_sectors(bio) != 0)
bio->bi_error = -EROFS;
bio_endio(bio);
- return;
+ return BLK_QC_T_NONE;
}
smp_rmb(); /* Ensure implications of 'active' are visible */
rcu_read_lock();
if (atomic_dec_and_test(&mddev->active_io) && mddev->suspended)
wake_up(&mddev->sb_wait);
+
+ return BLK_QC_T_NONE;
}
/* mddev_suspend makes sure no new requests are submitted
return err;
}
-static void nd_blk_make_request(struct request_queue *q, struct bio *bio)
+static blk_qc_t nd_blk_make_request(struct request_queue *q, struct bio *bio)
{
struct block_device *bdev = bio->bi_bdev;
struct gendisk *disk = bdev->bd_disk;
out:
bio_endio(bio);
+ return BLK_QC_T_NONE;
}
static int nd_blk_rw_bytes(struct nd_namespace_common *ndns,
return ret;
}
-static void btt_make_request(struct request_queue *q, struct bio *bio)
+static blk_qc_t btt_make_request(struct request_queue *q, struct bio *bio)
{
struct bio_integrity_payload *bip = bio_integrity(bio);
struct btt *btt = q->queuedata;
out:
bio_endio(bio);
+ return BLK_QC_T_NONE;
}
static int btt_rw_page(struct block_device *bdev, sector_t sector,
kunmap_atomic(mem);
}
-static void pmem_make_request(struct request_queue *q, struct bio *bio)
+static blk_qc_t pmem_make_request(struct request_queue *q, struct bio *bio)
{
bool do_acct;
unsigned long start;
wmb_pmem();
bio_endio(bio);
+ return BLK_QC_T_NONE;
}
static int pmem_rw_page(struct block_device *bdev, sector_t sector,
static int dcssblk_open(struct block_device *bdev, fmode_t mode);
static void dcssblk_release(struct gendisk *disk, fmode_t mode);
-static void dcssblk_make_request(struct request_queue *q, struct bio *bio);
+static blk_qc_t dcssblk_make_request(struct request_queue *q,
+ struct bio *bio);
static long dcssblk_direct_access(struct block_device *bdev, sector_t secnum,
void __pmem **kaddr, unsigned long *pfn);
up_write(&dcssblk_devices_sem);
}
-static void
+static blk_qc_t
dcssblk_make_request(struct request_queue *q, struct bio *bio)
{
struct dcssblk_dev_info *dev_info;
bytes_done += bvec.bv_len;
}
bio_endio(bio);
- return;
+ return BLK_QC_T_NONE;
fail:
bio_io_error(bio);
+ return BLK_QC_T_NONE;
}
static long
/*
* Block device make request function.
*/
-static void xpram_make_request(struct request_queue *q, struct bio *bio)
+static blk_qc_t xpram_make_request(struct request_queue *q, struct bio *bio)
{
xpram_device_t *xdev = bio->bi_bdev->bd_disk->private_data;
struct bio_vec bvec;
}
}
bio_endio(bio);
- return;
+ return BLK_QC_T_NONE;
fail:
bio_io_error(bio);
+ return BLK_QC_T_NONE;
}
static int xpram_getgeo(struct block_device *bdev, struct hd_geometry *geo)
return count;
}
-static void loop_make_request(struct request_queue *q, struct bio *old_bio)
+static blk_qc_t loop_make_request(struct request_queue *q, struct bio *old_bio)
{
struct lloop_device *lo = q->queuedata;
int rw = bio_rw(old_bio);
goto err;
}
loop_add_bio(lo, old_bio);
- return;
+ return BLK_QC_T_NONE;
err:
bio_io_error(old_bio);
+ return BLK_QC_T_NONE;
}
static inline void loop_handle_bio(struct lloop_device *lo, struct bio *bio)
#define REQ_MQ_INFLIGHT (1ULL << __REQ_MQ_INFLIGHT)
#define REQ_NO_TIMEOUT (1ULL << __REQ_NO_TIMEOUT)
+typedef unsigned int blk_qc_t;
+#define BLK_QC_T_NONE -1U
+#define BLK_QC_T_SHIFT 16
+
+static inline bool blk_qc_t_valid(blk_qc_t cookie)
+{
+ return cookie != BLK_QC_T_NONE;
+}
+
+static inline blk_qc_t blk_tag_to_qc_t(unsigned int tag, unsigned int queue_num)
+{
+ return tag | (queue_num << BLK_QC_T_SHIFT);
+}
+
+static inline unsigned int blk_qc_t_to_queue_num(blk_qc_t cookie)
+{
+ return cookie >> BLK_QC_T_SHIFT;
+}
+
+static inline unsigned int blk_qc_t_to_tag(blk_qc_t cookie)
+{
+ return cookie & 0xffff;
+}
+
#endif /* __LINUX_BLK_TYPES_H */
struct blk_queue_ctx;
typedef void (request_fn_proc) (struct request_queue *q);
-typedef void (make_request_fn) (struct request_queue *q, struct bio *bio);
+typedef blk_qc_t (make_request_fn) (struct request_queue *q, struct bio *bio);
typedef int (prep_rq_fn) (struct request_queue *, struct request *);
typedef void (unprep_rq_fn) (struct request_queue *, struct request *);
extern int blk_register_queue(struct gendisk *disk);
extern void blk_unregister_queue(struct gendisk *disk);
-extern void generic_make_request(struct bio *bio);
+extern blk_qc_t generic_make_request(struct bio *bio);
extern void blk_rq_init(struct request_queue *q, struct request *rq);
extern void blk_put_request(struct request *);
extern void __blk_put_request(struct request_queue *, struct request *);
extern void inode_sb_list_add(struct inode *inode);
#ifdef CONFIG_BLOCK
-extern void submit_bio(int, struct bio *);
+extern blk_qc_t submit_bio(int, struct bio *);
extern int bdev_read_only(struct block_device *);
#endif
extern int set_blocksize(struct block_device *, int);
return ppa;
}
-typedef void (nvm_tgt_make_rq_fn)(struct request_queue *, struct bio *);
+typedef blk_qc_t (nvm_tgt_make_rq_fn)(struct request_queue *, struct bio *);
typedef sector_t (nvm_tgt_capacity_fn)(void *);
typedef int (nvm_tgt_end_io_fn)(struct nvm_rq *, int);
typedef void *(nvm_tgt_init_fn)(struct nvm_dev *, struct gendisk *, int, int);
projects / cascardo / linux.git / commitdiff